A record of her erotic pure love affair, where she had sex with her gravure idol while she was away on a trip for four days.

The girl I live with is Takasho, a celebrity. One day, the night the three of us drank together, she got drunk and fell asleep, and the only two of us were awake, me and Takasho. When the conversation was interrupted and silent, a sudden deep kiss! We hadn't seen her since, but when she was about to leave her house on a trip, Takasho called me... This is a record of four days of playing sad lovers with her older sister during a limited time.